/rust/registry/src/index.crates.io-6f17d22bba15001f/indexmap-2.2.6/src/util.rs
Line | Count | Source (jump to first uncovered line) |
1 | | use core::ops::{Bound, Range, RangeBounds}; |
2 | | |
3 | 0 | pub(crate) fn third<A, B, C>(t: (A, B, C)) -> C { |
4 | 0 | t.2 |
5 | 0 | } |
6 | | |
7 | | pub(crate) fn simplify_range<R>(range: R, len: usize) -> Range<usize> |
8 | | where |
9 | | R: RangeBounds<usize>, |
10 | | { |
11 | | let start = match range.start_bound() { |
12 | | Bound::Unbounded => 0, |
13 | | Bound::Included(&i) if i <= len => i, |
14 | | Bound::Excluded(&i) if i < len => i + 1, |
15 | | bound => panic!("range start {:?} should be <= length {}", bound, len), |
16 | | }; |
17 | | let end = match range.end_bound() { |
18 | | Bound::Unbounded => len, |
19 | | Bound::Excluded(&i) if i <= len => i, |
20 | | Bound::Included(&i) if i < len => i + 1, |
21 | | bound => panic!("range end {:?} should be <= length {}", bound, len), |
22 | | }; |
23 | | if start > end { |
24 | | panic!( |
25 | | "range start {:?} should be <= range end {:?}", |
26 | | range.start_bound(), |
27 | | range.end_bound() |
28 | | ); |
29 | | } |
30 | | start..end |
31 | | } |
32 | | |
33 | | pub(crate) fn try_simplify_range<R>(range: R, len: usize) -> Option<Range<usize>> |
34 | | where |
35 | | R: RangeBounds<usize>, |
36 | | { |
37 | | let start = match range.start_bound() { |
38 | | Bound::Unbounded => 0, |
39 | | Bound::Included(&i) if i <= len => i, |
40 | | Bound::Excluded(&i) if i < len => i + 1, |
41 | | _ => return None, |
42 | | }; |
43 | | let end = match range.end_bound() { |
44 | | Bound::Unbounded => len, |
45 | | Bound::Excluded(&i) if i <= len => i, |
46 | | Bound::Included(&i) if i < len => i + 1, |
47 | | _ => return None, |
48 | | }; |
49 | | if start > end { |
50 | | return None; |
51 | | } |
52 | | Some(start..end) |
53 | | } |